What type of steel is HCT780X and What steel grade corresponds to the national standard?

January 16 16:38 2025

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HCT780X is a dual phase high-strength cold-rolled automotive steel plate, with the following chemical composition and mechanical properties:

The equivalent steel grades are: HC420/780DPD+Z, HC420/780DPD+ZF, HC420/780DP, B400/780DP, B400/780DP, HCT780X, CR780T/420Y-DP, DP 780T/420Y Wait.

HCT780X (1.0943), Grade: HCT780X, Number: 1.0943, Classification: Alloy quality steel

Standard:

EN 10336: 2006 Continuously hot dip coated and electrically coated strip and sheet of multiple steels for cold forming Technical delivery conditions

EN 10346: 2009 Continuously hot dip coated steel flat products Technical delivery conditions

Equivalent grades:

HC420/780DPD+Z, HC420/780DPD+ZF, HC420/780DP, B400/780DP, B400/780DP, HCT780X, CR780T/420Y-DP, DP 780T/420Y

Chemical composition% of steel HCT780X (1.0943): EN 10336-2006

2.Si, Mn, P, S, V, Al, B, – max 0.18, max 0.8, max 2.5, max 0.08, max 0.015, max 0.2, max 2, max 0.005, Cr+Mo<1, Nb+Ti<0.15

Mechanical properties

Mechanical properties yield strength 440-550

Tensile strength 780

Elongation after fracture 14%

Heat treatment conditions

+A Soft annealed

+AC Annealed to achieve spheroidization of the carbides

+AR As rolled

+AT Solution annealed

+C Cold drawn / hard

+CR Cold rolled

+FPT reated to ferrite-pearlite structure and hardness range

+II sothermal annealing

+LC Cold drawn / soft

+M Thermo mechanical rolling

+N Normalized

+NT Normalized and tempered

+P Precipitation hardened

+PE Peeled

+QA Air quenched and tempered

+QL Liquid quenched and tempered

+QT Quenched and tempered

+S Treated to improve shearability

+SH As rolled and turned

+SR Cold drawn and stress relieved

+T Tempered

+TH Treated to hardness range

+WW Warm worked

+U Untreated

Alloy quality steel

Chemical composition of steel HCT780X (1.0943), Standards of steel HCT780X (1.0943)

Mechanical Properties of steel HCT780X (1.0943) steel HCT780X (1.0943) Tensile Strength, Elongation, Proof strength, Hardness New Gapower metal is a professional car steel suppler, especially pay more attention in steel coil, plate, bar, pipe in car field. Welcome to customer inquire.

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